Steel Pre-Flattened O-Ring Head Gasket
Suit Pro Stock BB Chev Mark IV Block, 4.620 Bore, .051 Compressed Thickness, Two Coolant Holes Per End
Round bore, will not fit some cylinder head valve pockets
Fits Mark IV Block
Does not Fit Gen V Block
Does not Fit Gen VI Block
Two coolant holes per end.
Three lower coolant holes
Fel-Pro wire ring head gaskets, with a stainless steel combustion armour, proprietary-coated composite facing material and a solid steel core deliver and unbeatable combination of quality, capability and value making them the single best choice for the vast majority of racing and street performance engines.